$OpenBSD: patch-icc_icc_h,v 1.2 2017/05/26 21:17:12 ajacoutot Exp $

C99 is not just MSC

Index: icc/icc.h
--- icc/icc.h.orig
+++ icc/icc.h
@@ -130,8 +130,16 @@
 #define PF64PREC "I64"				/* printf format precision specifier */
 #define CF64PREC "LL"				/* Constant precision specifier */
 
+#ifdef _MSC_VER
 #ifndef ATTRIBUTE_NORETURN
 # define ATTRIBUTE_NORETURN __declspec(noreturn)
+#endif
+#endif
+
+#ifdef __GNUC__
+#ifndef ATTRIBUTE_NORETURN
+# define ATTRIBUTE_NORETURN __attribute__((noreturn))
+#endif
 #endif
 
 #else  /* !_MSC_VER */
